Nature's Graffiti

Challenge #176 in the Life in the Natural World series. Hosted by RuthC.
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Before humans left their marks on walls and buildings, nature was already demonstrating graffiti in interesting places. Show us some examples of this. It may be carvings by beetles under tree bark, snail trails, leaves with wandering paths beneath their surfaces caused by tiny insects, tidal marks in the beach sand... Please, no graffiti or markings made by humans or domestic pets, and minimal evidence of man or man-made structures. Macro and close-ups welcome. Size of entry: 1,600 pixels on the longer side.
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phase has
57 entries
phase has
1129 votes
driftwood at sunrise
Bizarre graffiti green leaf
Psychedelic Rock
Graffiti by wave
Prehistoric Fern
Sand Balls Left by Crabs Building their Home
Bryce Canyon
Granite stripes
Mamoth Hot Spring-32
Sand patterns
Nature's mossy artwork
Pot of Paint, Yellowstone National Park
Van Gogh tree bark
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Sample entries
These entries were provided by the challenge host(s) as samples and cannot be voted on.
Grafifiti in a Tall Tree
Scribbles in a Leaf
1,600px MAXIMUM
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